Temperature-Insensitive Torsion Sensor With Enhanced Sensitivity by Use of a Highly Birefringent Photonic Crystal Fiber

Author

Kim, Hyun-Min ; Kim, Tae-Hun ; Kim, Bongkyun ; Chung, Youngjoo

Author_Institution

Gwangju Inst. of Sci. & Technol. (GIST), Gwangju, South Korea

Volume

22

Issue

20

fYear

2010

Firstpage

1539

Lastpage

1541

Abstract

We report on enhanced torsion sensitivity by using a highly birefringent photonic crystal fiber (HB-PCF)-based Sagnac interferometer. In order to increase the torsion sensitivity, we introduced an anisotropic microstructure into the cross section of an HB-PCF by enlarging the size of air holes of one row. This can result in a high birefringence of the order of 10^-3 and low sensitivities to bending and temperature. The torsion sensitivity was measured to be high with ~0.06 nm/°.

Keywords

Sagnac interferometers; birefringence; fibre optic sensors; holey fibres; mechanical variables measurement; photonic crystals; torsion; HB-PCF; Sagnac interferometer; anisotropic microstructure; highly birefringent photonic crystal fiber; temperature-insensitive torsion sensor; torsion sensitivity; Optical fiber polarization; Optical fiber sensors; Sensitivity; Silicon; Temperature measurement; Temperature sensors; Highly birefringent photonic crystal fiber (HB-PCF); Sagnac interferometer (SI); torsion sensor with enhanced sensitivity;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2068043

Filename

5551175